This was the place from where a frenchie decided to make Portugal indepent from Leon and to make himself the king in the process.
Summicron is a nice lens. And your image too.

It was a great castle. Where do you live in Portugal? My girlfriend and I were there two years ago, in Guimaraes and Porto. I was testing out a 28mm Summicron while I was there.

The castle was too tall for the lens.
;-)